Top 10 Undertale Bosses


The Top Ten

1 Sans Sans Sans or Sans the Skeleton is a character in the 2015 RPG Undertale created by Toby Fox. He is a lazy, pun-loving skeleton who is a supporting protagonist in the "pacifist" and "neutral" routes of Undertale, and a heroic antagonist/final boss of the "genocide" route. He is known for his incredibly difficult more.

Such a troll and the theme is so awesome I could listen to it for 10 weeks straight. I'm a lot like him too. I'm lazy and I can't stop making bad puns. I've listened to multiple versions of the song and all are rated over 1 million!

Seems like a cool boss, but I haven't got anywhere near the heart that a Genocide run requires. - Garythesnail

It took my friend a whole month to actually defeat Sans. I never did this route because I didn't have the heart to. - Rue

This is easily my favorite. But still haven't beat him yet

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2 Mettaton Mettaton Mettaton is a character in the popular 2015 RPG game, Undertale. He is a robot with a soul built by Dr. Alphys, and is the sole television star of the underground. Mettaton is a popular character in the fanbase. His notable features include his legs, and his catchphrase "OH YESSSS!"

All right! I think we were all expecting Sans but I definitely think Mettaton is the best. He also has by far the best theme song and of course the best legs.

Wow! It's cool to see him at number one! He's probably my favorite. - Garythesnail

NO! I thought Mettaton was winning! I mean just LOOK AT DEM LEGS! (and ratings too! )


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3 Asriel Dreemurr Asriel Dreemurr Asriel Dreemurr is the child of Toriel and Asgore in the 2015 game Undertale made by Toby Fox. Asriel passed away prior to the games events, and is only mentioned of in the final moments of two of the games possible endings.

He's not the hardest boss but it is an amazing showdown

He's not very hard since you really can't lose, but he's the boss that'll probably pull on your heartstrings the most, only behind Asgore.

Asriels my personal favourite character and has a variety of attacks

Fun,Amazing,Heart-Wrenching,and Easily Best Music in The Game.I Mean,in Floweys Fight You Where Fighting a Flower in an Awesome Creepy Sans' Fight,it Was Just Rage.But in This Fight Your Fighting a HYPERGOD.

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4 Photoshop Flowey

First thing that comes to mind: WHAT IN THE NAME OF ALL THAT IS LIFE IS THAT?! This guy has no strategy, no mercy, just pure bullet hell. The only reason I don't really consider him top 3 worthy is because he really isn't that hard (unless you're doing a no-hit run, then good luck).

I sometimes wonder what Toby Fox was on when designing this boss. Like... no sane person or someone not doing drugs would create this. There is no way. - Rue


5 Papyrus Papyrus Papyrus is a character from the 2015 game Undertale, made by Toby Fox . He is the Younger brother of Sans the skeleton, royal guard in training, and a sentry in the town of Snowdin . Opposite to his brother, papyrus is active, loud, and full of himself; but in an endearing way. Papyrus means to become more.

I love this boss but there is one downside, to spare him you just have to die to him 3 times (I think)

Papyrus is my favorite caricature in the game! And I got to saw that when I saw his boss fight it was funny and the dating thing was hilarious,but there are better fights in the game.

I really love this boss fight because its easy and fun! its pretty amusing and there are a lot of jokes in there - and it gets even better if you decide to flirt with papyrus! you don't even really need to do anything, as you can just die three times and precious cinnamon roll papyrus will spare you anyway. he just can't bear to hurt you, aww - Mentalheart

6 Asgore Dreemurr

The epic opening, breaking mercy, forced to fight the kindest monster in the underground, his final words, the bitter end. no other boss represents Undertale better than Asgore

This is a boss that is not only difficult, it's a pretty emotional one. He's reluctant to fight, he can't even look at you in the eye, the music fills the atmosphere, his attacks weaken as your HP lowers, etc. enough said.

7 Undyne the Undying

I am stuck on undyne the undying, and I just can't kill her!

Lel I murdered first try but I had 1 hp left and her death was very sad. by the way, her attacks get more powerful when she has low hps.

8 Muffet Muffet

Her song is one of the best I've heard in this game, her fight is innovative, it's fairly challenging, enough said.

Muffet is so awesome. I love her song, I love her design, I just love her. period.

You can even skip this battle. The YouTuber I watched skipped it, and I usually HATE spiders, but today I did some research...

Best boss

9 Mad Dummy V 1 Comment
10 Toriel Toriel Toriel is a main character in Toby Fox's 2016 RPG, Undertale. She is an amazing blend of goat and mother.

She's definitely one of the easiest bosses, but also one of those bosses that can really pull on your heartstrings.

The Contenders

11 Alphys NEO
12 Snowdrake's Mother V 1 Comment
13 Lemon Bread
14 Memoryhead V 1 Comment
15 Undyne Undyne Undyne is a main character in Toby Fox's 2016 RPG, Undertale. She is the heroic fishlike captain of the Royal Guard, who takes it upon herself to protect the monsters of the Underground. Her name is derived from the word "Undine", and is a pun on the word "Undying". Her most loved monsters are her mentor, more.

Why is she down here her genocide fight is amazing

16 Glyde
17 Mettaton NEO V 1 Comment
18 Omega Flowey

The soul's attacks are so amazing! How is this last? Also The entrance is cool.

19 Greater Dog Greater Dog

All of the dogs in the game are so cute! - Pegasister12

V 1 Comment
20 Reaper Bird Reaper Bird
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List StatsUpdated 28 Jun 2017

100 votes
23 listings
1 year, 140 days old

Top Remixes (5)

1. Mettaton
2. Omega Flowey
3. Muffet
1. Photoshop Flowey
2. Sans
3. Mettaton
1. Photoshop Flowey
2. Mettaton
3. Papyrus

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